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For the Inventor, By the Inventor

Tokyo, Japan

Daikyo Seiko, Ltd.

Calculating rank
USPTO Granted Patents = 127

% Expired Patents = 15.0



Trademarks = 17

Forward Citations = 2,808

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41 inventors (with patents filed for the assignee):

goldMedal Hideaki Kawamura (57 out of 170 patents)

silverMedal Morihiro Sudo (25 out of 32 patents)

bronzeMedal Masamichi Sudo (20 out of 21 patents)

4.  Hiroshi Togashi (16 out of 16 patents)

5.  Takayuki Yoshida (13 out of 14 patents)

6.  Yasushi Kawachi (5 out of 11 patents)

7.  Nobuo Sudo (5 out of 5 patents)

8.  Scott Young (3 out of 4 patents)

9.  Tsuyoshi Koshidaka (3 out of 3 patents)

10.  Kouichi Asai (3 out of 12 patents)

11.  Tomoyasu Muraki (3 out of 3 patents)

12.  Daisuke Tsukiji (3 out of 3 patents)

13.  Kurato Akiba (2 out of 3 patents)

14.  Yuta Kuroki (2 out of 7 patents)

15.  Takashi Uemura (2 out of 2 patents)


Core Competencies:
Syringe Barrel
Plastic Cap
Medical Container
Drug Transfer Device
Sealing Device
Vial Cap
Sterilization Tray
Injector Piston Nest
Plunger Rod
Vacuum Package System
Rubber Plug
Microtube

127 patents:

1. 12781002 - Fluorine resin film, molded rubber body, and method for manufacturing molded rubber body (2026-11-03),
2. 12753286 - Fluorine resin film and molded rubber body (2026-10-06),
3. 12514786 - Transport container (2026-01-06),
4. 12514784 - Plastic cap and closed system drug transfer device (2026-01-06),
5. D1107225 - Syringe barrel with needle (2025-12-23),
6. 11925490 - Packaged medical device (2024-03-12),
7. D976107 - Plastic cover (2023-01-24),
8. 11547518 - Packaged medical device (2023-01-10),
9. 11540893 - Container (2023-01-03),
10. 11540892 - Packaged medical device and method for manufacturing packaged medical device (2023-01-03),
11. D970341 - Plastic cover (2022-11-22),
12. 11179296 - Container holding member and medical container set (2021-11-23),
13. 11161671 - Medical device container (2021-11-02),
14. 10994903 - Plastic cap and production method thereof (2021-05-04),
15. 10918784 - Holding member and packaging structure of chemical container parts (2021-02-16),
Company Overview
Daikyo Seiko, Ltd., headquartered in Tokyo, Japan, specializes in the development and manufacturing of medical device packaging solutions. The company focuses on a range of core technologies, including syringe barrels, plastic caps, and various medical containers designed for safe drug transfer and storage. Their expertise extends to sealing devices, vial caps, sterilization trays, and injector piston nests, ensuring high standards of quality and safety in the medical packaging sector. Daikyo Seiko is committed to advancing healthcare through innovative packaging solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

Daikyo Seiko, Ltd. USPTO Patent Assignee Logo
127 Patents

#478 in Tokyo

#974 in Japan

#6,328 in the World

Tokyo, JP
Tokyo, Japan

Daikyo Seiko, Ltd.

Forward Citations = 2,808

41 inventors:

goldMedal Hideaki Kawamura (57 out of 170 patents)

silverMedal Morihiro Sudo (25 out of 32 patents)

bronzeMedal Masamichi Sudo (20 out of 21 patents)

4.  Hiroshi Togashi (16 out of 16 patents)

5.  Takayuki Yoshida (13 out of 14 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Daikyo Seiko, Ltd.. Retrieved from https://idiyas.com/company/daikyo-seiko

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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